Recycled laminating pouches?

I often need to produce A4 posters to pin to lamp osts etc. advertising events around my village. The most recent one was for a sustainable village meeting! But in order to make them last beyond the next rain shower, they have to be laminated. Has anyone found laminating pockets made of recycled plastic? We have tried using (and re-using plastic wallets, but once they are punctured by a pin they leak and look shabby).

I had a quick search and the only thing I can suggest is to go old school and use PVA and paper. There is likely to be biodegradable alternatives coming through but can’t find them…